diff options
| author | David Howells <dhowells@redhat.com> | 2020-06-12 23:58:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-24 17:50:46 +0200 |
| commit | c8c19fcdabdbcc923564cc9258b01db3c0e0ed22 (patch) | |
| tree | 2ce86be3417abe3013dbfb481124775ba6be858d /fs/afs | |
| parent | 6a9fd8046fbd32248b5f18c023c2689834e5ff95 (diff) | |
afs: afs_write_end() should change i_size under the right lock
[ Upstream commit 1f32ef79897052ef7d3d154610d8d6af95abde83 ]
Fix afs_write_end() to change i_size under vnode->cb_lock rather than
->wb_lock so that it doesn't race with afs_vnode_commit_status() and
afs_getattr().
The ->wb_lock is only meant to guard access to ->wb_keys which isn't
accessed by that piece of code.
Fixes: 4343d00872e1 ("afs: Get rid of the afs_writeback record")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/afs')
| -rw-r--r-- | fs/afs/write.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c index 371db86c6c5e..96b042af6248 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -194,11 +194,11 @@ int afs_write_end(struct file *file, struct address_space *mapping, i_size = i_size_read(&vnode->vfs_inode); if (maybe_i_size > i_size) { - spin_lock(&vnode->wb_lock); + write_seqlock(&vnode->cb_lock); i_size = i_size_read(&vnode->vfs_inode); if (maybe_i_size > i_size) i_size_write(&vnode->vfs_inode, maybe_i_size); - spin_unlock(&vnode->wb_lock); + write_sequnlock(&vnode->cb_lock); } if (!PageUptodate(page)) { |